This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...
This media is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this work without contacting the Smithsonian. For more information, visit the Smithsonian's ...
In the unicellular freshwater alga Cosmarium (magnified 100x), an isthmus containing a single haploid nucleus separates two symmetrical semicells.
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